詹金斯永远不会完成构建

Question

我的Jenkins构建从未完成，当我重新启动它时，控制台输出显示以下错误：

FATAL: null
java.lang.NullPointerException
    at hudson.scm.SCM.getDescriptor(SCM.java:653)
    at hudson.scm.AutoBrowserHolder.get(AutoBrowserHolder.java:54)
    at hudson.scm.SCM.getEffectiveBrowser(SCM.java:136)
    at hudson.scm.ChangeLogParser.parse(ChangeLogParser.java:57)
    at hudson.model.AbstractBuild.calcChangeSet(AbstractBuild.java:927)
    at hudson.model.AbstractBuild.getChangeSet(AbstractBuild.java:895)
    at hudson.model.AbstractBuild.getCulprits(AbstractBuild.java:349)
    at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:672)
    at hudson.model.Run.execute(Run.java:1763)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
    at hudson.model.ResourceController.execute(ResourceController.java:98)
    at hudson.model.Executor.run(Executor.java:410)
ERROR: Build step failed with exception
java.lang.IllegalStateException: Jenkins has not been started, or was already shut down

..

你有什么想法？

谢谢